A buckle structure with variable buckle amount
By using a clamping plate with variable clamping force and a multi-segment deformable reverse limiting arm, the problem of insufficient clamping force of sheet-like clamping structures is solved, enabling efficient clamping of objects of different sizes and improving automated production efficiency and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN LIQI TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-31
AI Technical Summary
Existing sheet-like snap-fit structures have insufficient clamping force, are prone to deformation, cannot meet the clamping requirements of objects of different sizes, and have a short service life, making them unsuitable for automated production.
The clamping body is composed of a clamping plate with variable clamping force and multiple deformable reverse limiting arms. The reverse limiting arms abut against each other after deformation, so as to achieve the tilting clamping of the clamping plate. The clamping force increases with the force of the object, providing the best clamping effect.
It improves clamping efficiency in automated production, can adapt to clamping objects of different sizes, extends service life, reduces human intervention, and improves production efficiency.
Smart Images
Figure CN224579593U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a snap-fit structure, specifically a snap-fit structure with variable snap amount. Background Technology
[0002] In mechanical production or plastic packaging processes, clamping mechanisms are often used in conjunction with pick-and-place mechanisms to hold objects, thereby facilitating subsequent production processes.
[0003] In some simpler clamping and limiting structures, snap-on structures are used for clamping and fixing. These snap-on structures use opposing inclined clamping surfaces to limit and clamp objects. When an object is placed in, the inclined surfaces generate a certain reaction force, thereby achieving fixed clamping. However, existing sheet-like snap-on structures have insufficient clamping force. Under the action of external force or the weight of the object itself, the clamping plate will deform in the opposite direction of the clamping force, resulting in the inability to clamp the object. In addition, existing sheet-like snap-on structures have a fixed clamping amount, which limits the size of the clamped object. When clamping an object whose clamping amount does not match the clamping amount, the snap-on body can only be deformed manually to adapt to the object to be clamped. However, such operation for a long time will cause the snap-on body to be damaged quickly, with a short service life. It also requires manual intervention, which is not suitable for automated production requirements and affects production efficiency. Therefore, a snap-on structure with variable clamping amount is proposed to solve the problems existing in the current technology. Utility Model Content
[0004] The purpose of this utility model is to address the defects or deficiencies in the existing technology by providing a buckle structure with variable clamping amount. The buckle body is formed by using a clamping plate with variable clamping amount and multiple deformable reverse limiting arms. After deformation, the reverse limiting arms abut against each other, so that the clamping plate is tilted to clamp the object to be clamped. The greater the force generated by the object, the greater the clamping force provided by the clamping plate, thereby achieving the best clamping effect within the load limit and greatly improving the clamping efficiency in automated production.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a first fastener a and a second fastener b fixed on the mounting base plate 1. The first fastener a and the second fastener b have the same structure. The first fastener a includes a clamping plate 2 and a fixing arm 3. The clamping plate 2 is provided with a first spring piece 6 at one end of the mounting base plate 1 and connected to the mounting base plate 1. The fixing arm 3 is fixedly disposed on the mounting base plate 1. A first reverse limiting arm 4 and a second reverse limiting arm 5 are sequentially connected to the front end of the fixing arm 3. The second reverse limiting arm 5 is connected to the clamping plate 2. The first reverse limiting arm 4 and the second reverse limiting arm 5 are inclined towards the clamping plate 2 with the fixing arm 3 as the end. In the state without fastening, the clamping plate 2 is perpendicular to the mounting base plate 1.
[0006] Furthermore, a second spring piece 7 is provided between the fixed arm 3 and the first reverse limiting arm 4, and the second spring piece 7 is located on the side of the connection surface between the fixed arm 3 and the first reverse limiting arm 4 away from the clamping plate 2.
[0007] Furthermore, a third spring 8 is provided between the first reverse limiting arm 4 and the second reverse limiting arm 5, and the third spring 8 is provided on the side of the first reverse limiting arm 4 and the second reverse limiting arm 5 facing the mounting substrate 1.
[0008] Furthermore, a fourth spring 9 is provided between the second reverse limiting arm 5 and the clamping plate 2.
[0009] Furthermore, the fourth spring 9 is located in the middle of the clamping plate 2.
[0010] Furthermore, the first reverse limiting arm 4 and the second reverse limiting arm 5 form a linked V-shaped structure that acts on the clamping plate 2.
[0011] Furthermore, the vertical projection length of the clamping plate 2 on the mounting base plate 1 on the side away from the fixing arm 3 is the deduction amount.
[0012] Furthermore, the included angle between the fixed arm 3 and the first reverse limiting arm 4 is greater than 90° when the deflection is 0.
[0013] Furthermore, the included angle between the inner sides of the first reverse limiting arm 4 and the second reverse limiting arm 5 is less than 90° when the deflection is 0.
[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: by using a clamping plate with variable clamping amount and multiple deformable reverse limiting arms to form a clamping body, the reverse limiting arms abut against each other after deformation, so that the clamping plate is tilted to clamp the object to be clamped. The greater the force generated by the object, the greater the clamping force provided by the clamping plate, thereby obtaining the best clamping effect within the load limit, thus greatly improving the clamping efficiency in automated production. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the present invention in the state of no buckling.
[0017] Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle;
[0018] Figure 3 This is a schematic diagram of the maximum deduction state of this utility model;
[0019] Figure 4 yes Figure 2 Enlarged structural diagram at point B.
[0020] Explanation of reference numerals in the attached drawings: 1. Mounting base plate; 2. Clamping plate; 3. Fixing arm; 4. First reverse limiting arm; 5. Second reverse limiting arm; 6. First spring; 7. Second spring; 8. Third spring; 9. Fourth spring. Detailed Implementation
[0021] See Figures 1-4 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a first buckle a and a second buckle b fixed on the mounting base plate 1. The first buckle a and the second buckle b have the same structure. In some production activities, such as plastic packaging, it is necessary to use a fixed buckle to clamp objects for subsequent operations, such as a sheet-like buckle structure. However, the traditional sheet-like buckle is a fixed structure with a certain degree of elasticity to clamp the items, but it does not have an adjustable clamping amount, so the size of the objects that can be clamped is limited. Moreover, in the process of use, if some oversized items are forcibly clamped, it is necessary to compress the buckle to deform in order to clamp the items. The traditional clamping method is prone to damaging the buckle body and has poor fixing effect. In this embodiment, two buckles with the same structure but placed in opposite positions are set on the mounting base plate. The two buckles have a linkage structure. A pressure device is set on the outside of the two buckles to apply initial pressure to the buckles, so that the linkage structure breaks the reverse horizontal balance state, increases the clamping amount to achieve clamping. When the object to be clamped is removed, the buckles are pulled beyond the horizontal balance position of the linkage structure, and the clamping amount is reduced to achieve unlocking. The adjustable linkage structure makes the clamping amount adjustable, which not only improves the clamping effect, but also adapts to the clamping of different sizes of items within a certain range, making it more practical.
[0022] Specifically, the first buckle body a includes a clamping plate 2 and a fixing arm 3. The clamping plate 2 is provided with a first spring piece 6 at one end of the mounting base plate 1 and is connected to the mounting base plate 1. The fixing arm 3 is fixedly disposed on the mounting base plate 1. The front end of the fixing arm 3 is sequentially connected with a first reverse limiting arm 4 and a second reverse limiting arm 5. The second reverse limiting arm 5 is connected to the clamping plate 2. The first reverse limiting arm 4 and the second reverse limiting arm 5 are inclined towards the clamping plate 2 with the fixing arm 3 as the end. In the state of no buckling, the clamping plate 2 is perpendicular to the mounting base plate 1. The entire buckle body is a four-segment structure. The base is a fixed arm that cannot be moved or deformed. The first reverse limiting arm, the second reverse limiting arm and the clamping plate are linked and deformable structures. A spring piece structure is provided at the joint connection as a deformation fulcrum. The spring piece is a flexible thin sheet that can be bent.
[0023] In the initial state, the vertical projection length of the clamping plate 2 on the mounting base plate 1 away from the fixed arm 3 is the deduction amount. At this time, the projection length is 0, so the deduction amount is 0. At this time, the connection point of the first reverse limiting arm and the second reverse limiting arm protrudes outward. The inner angle between the first reverse limiting arm 4 and the second reverse limiting arm 5 is less than 90°. When the deduction amount is 0, the inner angle between the fixed arm 3 and the first reverse limiting arm 4 is greater than 90°. The first reverse limiting arm 4 and the second reverse limiting arm 5 form a linked V-shaped structure that acts on the clamping plate 2. The clamping plate is pushed to rotate, which will cause the deduction amount to change. The larger the rotation angle, the larger the deduction amount. Different deduction amounts can be matched with different objects to be clamped to obtain corresponding clamping effects.
[0024] In use, an external device applies a downward pressure force to the first reverse limiting arm near its position, causing the first reverse limiting arm to rotate and move closer to the fixed arm. Simultaneously, this rotates the second reverse limiting arm, bringing it closer to the mounting substrate. The angle between the inner sides of the fixed arm and the first reverse limiting arm gradually decreases, while the angle between the inner sides of the first and second reverse limiting arms gradually increases. When the angle between the inner sides of the first and second reverse limiting arms exceeds 180° (the horizontal equilibrium point), this joint point rapidly moves closer to the mounting substrate. Simultaneously, the linkage between the first and second reverse limiting arms pushes the clamping plate to rotate on the mounting substrate. The projected length of the clamping plate on the mounting substrate continuously increases, thus increasing the clamping amount and the clamping force between the two clamping bodies. This allows for clamping of the object. When the maximum clamping amount is reached, the clamping force between the inner sides of the fixed arm and the first reverse limiting arm... Since the angle is less than 90 degrees, when a reaction force acts perpendicularly on the first reverse limiting arm, the first reverse limiting arm will continue to rotate inward, and the angle between the fixed arm and the inner side of the first reverse limiting arm will continue to decrease. However, the angle between the inner side of the first reverse limiting arm and the second reverse limiting arm will exceed 180 degrees. When subjected to a vertical reverse force, it will continue to rotate upward, and the angle will continue to increase. Therefore, when the buckle structure of this embodiment applies a downward pressure force from an external device, the buckling amount will be adjusted under the action of the linkage structure, enabling it to clamp items of different sizes. However, the item to be clamped must be within the range of the maximum buckling amount and the no-buffering amount. During the clamping process, the item will generate a reaction force on the clamping plate, which will drive the linkage mechanism to continuously deform. The greater the reaction force, the greater the deformation, the greater the buckling amount, and therefore the greater the clamping force, achieving a self-reinforcing locking effect. Thus, no human intervention is required in automated production equipment, which can effectively improve the efficiency of automated production.
[0025] More specifically, a second spring plate 7 is provided between the fixed arm 3 and the first reverse limiting arm 4, and the second spring plate 7 is located on the side away from the clamping plate 2 of the connection surface between the fixed arm 3 and the first reverse limiting arm 4. The second spring plate is located on the outside as a rotation joint point, and when there is 0 deflection, the first reverse limiting arm can only rotate downward, thereby pushing the second reverse limiting arm downward to generate a linkage effect to push the clamping plate to clamp the object to be clamped.
[0026] More specifically, a third spring plate 8 is provided between the first reverse limiting arm 4 and the second reverse limiting arm 5, and the third spring plate 8 is provided on the side of the first reverse limiting arm 4 and the second reverse limiting arm 5 facing the mounting base plate 1. In this embodiment, the third spring plate needs to be provided on the inner side as a rotation joint point, so that when the first reverse limiting arm and the second reverse limiting arm rotate, the joint point moves closer to the mounting base plate, which can push the clamping plate to tilt towards the object to be clamped for clamping.
[0027] More specifically, a fourth spring plate 9 is provided between the second reverse limiting arm 5 and the clamping plate 2. The fourth spring plate 9 is located in the middle of the clamping plate 2. The fourth spring plate serves as the joint point between the clamping plate and the second reverse limiting arm, enabling the second reverse limiting arm to effectively push the clamping plate to rotate and clamp the object to be clamped.
[0028] The working principle of this utility model is as follows: When no object to be clamped is placed, both the first clamping body a and the second clamping body b are in an initial state with no clamping amount, that is, the clamping plate 2 is perpendicular to the mounting base plate 1, and the clamping amount is 0. At this time, the outer angle between the first fixing arm 3 and the first reverse limiting arm 4 is greater than 180° when the clamping amount is 0, and the inner angle between the first reverse limiting arm 4 and the second reverse limiting arm 5 is less than 90°. The object to be clamped can be horizontally inserted between the two clamping plates 2. During the insertion of the object to be clamped, an external force acts on the first reverse limiting arm 4, causing the first reverse limiting arm to be clamped. Arm 4 bends inward, pushing the top of the second reverse limiting arm 5 towards the mounting base 1, thereby pushing the free end of the clamping plate 2 inward to clamp the object to be clamped. During the clamping process, the angle between the clamping plate 2 and the mounting base 1 gradually decreases from 90°, and the clamping amount continuously increases. Meanwhile, the angle between the fixed arm 3 and the inner side of the first reverse limiting arm 4 gradually decreases, reaching less than 90° at the maximum clamping amount. Conversely, the angle between the inner side of the first reverse limiting arm 4 and the second reverse limiting arm 5 gradually increases from 90°, reaching greater than 180° at the maximum clamping amount. The first reverse limiting arm 4 presses against the second reverse limiting arm 5, preventing the clamping plate 2 from automatically resetting. The reaction force generated by the object being clamped on the clamping plate 2 is transmitted through the fourth spring 9 to the second reverse limiting arm 5, causing it to press further down. The angle between the inner sides of the first reverse limiting arm 4 and the second reverse limiting arm 5 continuously increases, while the angle between the fixed arm 3 and the inner side of the first reverse limiting arm 4 continuously decreases. This results in a continuous increase in clamping force, creating a self-reinforcing locking effect. When the object needs to be removed, the external force is removed, and the first reverse limiting arm 4 is activated. As arm 4 moves outward, the angle between the inner sides of the first reverse limiting arm 4 and the second reverse limiting arm 5 decreases, while the angle between the inner sides of the fixed arm 3 and the first reverse limiting arm 4 increases. When the angle between the inner sides of the first reverse limiting arm 4 and the second reverse limiting arm 5 is less than 180°, the linear balance between the first reverse limiting arm 4 and the second reverse limiting arm 5 will be broken under the reaction force of the object to be clamped. As a result, the object will quickly bulge outward and return to its initial state. The clamping plate 2 will also gradually return to a position perpendicular to the mounting base plate 1, and the clamping amount will return to 0. The object to be clamped can then be easily removed.
[0029] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A variable fastening amount fastening structure characterized by comprising: It includes a first buckle a and a second buckle b fixed on the mounting base (1). The first buckle a and the second buckle b have the same structure. The first buckle a includes a clamping plate (2) and a fixing arm (3). The clamping plate (2) is provided with a first spring piece (6) at one end of the mounting base (1) and is connected to the mounting base (1). The fixing arm (3) is fixedly disposed on the mounting base (1). The front end of the fixing arm (3) is sequentially connected with a first reverse limiting arm (4) and a second reverse limiting arm (5). The second reverse limiting arm (5) is connected to the clamping plate (2). The first reverse limiting arm (4) and the second reverse limiting arm (5) are inclined towards the clamping plate (2) with the fixing arm (3) as the end. In the state of no buckling, the clamping plate (2) is perpendicular to the mounting base (1).
2. The variable fastening amount fastening structure according to claim 1, characterized by: A second spring plate (7) is provided between the fixed arm (3) and the first reverse limiting arm (4), and the second spring plate (7) is located on the side of the connection surface between the fixed arm (3) and the first reverse limiting arm (4) away from the clamping plate (2).
3. The variable fastening amount fastening structure according to claim 1, characterized by: A third spring (8) is provided between the first reverse limiting arm (4) and the second reverse limiting arm (5), and the third spring (8) is provided on the side of the first reverse limiting arm (4) and the second reverse limiting arm (5) facing the mounting substrate (1).
4. The variable fastening amount fastening structure according to claim 1, characterized by: A fourth spring sheet (9) is provided between the second reverse limiting arm (5) and the clamping plate (2).
5. The variable fastening amount fastening structure according to claim 4, characterized by: The fourth spring (9) is located in the middle of the clamping plate (2).
6. The buckle structure with variable buckle amount according to claim 1, characterized in that: The first reverse limiting arm (4) and the second reverse limiting arm (5) form a linked V-shaped structure that acts on the clamping plate (2).
7. The buckle structure with variable fastening amount according to claim 1, characterized in that: The vertical projection length of the clamping plate (2) on the mounting base plate (1) on the side away from the fixing arm (3) is the deduction.
8. The buckle structure with variable fastening amount according to claim 1, characterized in that: The included angle between the fixed arm (3) and the first reverse limiting arm (4) is greater than 90° when the deflection is 0.
9. The buckle structure with variable fastening amount according to claim 1, characterized in that: The included angle between the first reverse limiting arm (4) and the second reverse limiting arm (5) is less than 90° when the deflection is 0.